414
Client Error
414 URI Too Long
The URI requested by the client is longer than the server is willing to interpret.
Definition (RFC 9110)
HTTP status code 414 414 URI Too Long is defined in RFC 9110 (HTTP Semantics), Section 15.5.15 — the current authoritative specification for HTTP semantics, published June 2022, which obsoletes the older RFC 7231 and RFC 2616.
Description
414 URI Too Long (formerly called Request-URI Too Long) indicates that the URL provided by the client exceeds the server's maximum allowed length. Most web servers have a default URL length limit between 2,000 and 8,000 characters. This often happens when large amounts of data are passed as GET parameters instead of using a POST body.
Common Causes
- Large search queries or filter sets passed as GET parameters
- Base64-encoded data embedded in the URL
- Recursive URL redirects creating extremely long paths
- Bug in application generating excessively long URLs
How to Fix
- Move large data payloads to the request body with POST
- Store state server-side and use a short ID in the URL
- Paginate or chunk large filter sets
- Review server configuration for maximum URL length limits
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